Drug General Information
Drug ID D07KSG
Drug Name Tamoxifen
Synonyms tamoxifen; 10540-29-1; trans-Tamoxifen; Crisafeno; Soltamox; Tamoxifene; Diemon; Tamoxifenum; Tamoxifeno; Tamizam; Istubol; Tamoxen; Citofen; Oncomox; Valodex; Retaxim; Tamoxifene [INN-French]; Tamoxifenum [INN-Latin]; Tamoxifeno [INN-Spanish]; Tamoxifen (Z); Tamoxifen and its salts; Tamoxifen [INN:BAN]; ICI-46474; ICI 47699; TRANS FORM OF TAMOXIFEN; CCRIS 3275; UNII-094ZI81Y45; HSDB 6782; CHEMBL83; EINECS 234-118-0; 1-p-beta-Dimethylaminoethoxyphenyl-trans-1,2-diphenylbut-1-ene; Citofen; Nourytam; Novaldex; Tamone; Tamoxifeno;Tamoxifenum; Tomaxithen; Gen-Tamoxifen; Istubal (TN); Nolvadex (TN); Nolvadex-D; Novo-Tamoxifen; Pms-Tamoxifen; Tamoplex (TN); Tamoxifen (INN); Tamoxifen (TN); Trans-Tamoxifen; Valodex (TN); TAMOXIFEN (TAMOXIFEN CITRATE (54965-24-1)); Trans-2-[4-(1,2-Diphenyl-1-butenyl)phenoxy]-N,N-dimethylethylamine; (Z)-1-(p-Dimethylaminoethoxyphenyl)-1,2-diphenyl-1-butene; (Z)-2-(4-(1,2-Diphenyl-1-butenyl)phenoxy)-N,N-dimethylethanamine; (Z)-2-(4-(1,2-diphenylbut-1-enyl)phenoxy)-N,N-dimethylethanamine; (Z)-2-(para-(1,2-Diphenyl-1-butenyl)phenoxy)-N,N-dimethylamine (IUPAC); (Z)-2-[4-(1,2)-DIPHENYL-1-BUTENYL)-PHENOXY]-N,N-DIMETHYLETHANAMINE; (Z)-2-[p-(1,2-Diphenyl-1-butenyl)phenoxy]-N,N-dimethylethylamine; 1-p-beta-Dimethylamino-ethoxyphenyl-trans-1,2-diphenylbut-1-ene; 1-para-beta-Dimethylaminoethoxyphenyl-trans-1,2-diphenylbut-1-ene; 2-[4-[(Z)-1,2-diphenylbut-1-enyl]phenoxy]-N,N-dimethylethanamine; 2-{4-[(1Z)-1,2-diphenylbut-1-en-1-yl]phenoxy}-N,N-dimethylethanamine; Tamoxifen (Hormonal therapy); [3H]tamoxifen
Drug Type Small molecular drug
Therapeutic Class Anticancer Agents
Company AstraZeneca plc
Structure D07KSG
Drug Resistance Mutations
Target Name Estrogen receptor (ESR1) Target Info
Gene Name ESR1
Uniprot ID ESR1_HUMAN
Species Homo sapiens
Reference Sequence MTMTLHTKASGMALLHQIQGNELEPLNRPQLKIPLERPLGEVYLDSSKPAVYNYPEGAAY
EFNAAAAANAQVYGQTGLPYGPGSEAAAFGSNGLGGFPPLNSVSPSPLMLLHPPPQLSPF
LQPHGQQVPYYLENEPSGYTVREAGPPAFYRPNSDNRRQGGRERLASTNDKGSMAMESAK
ETRYCAVCNDYASGYHYGVWSCEGCKAFFKRSIQGHNDYMCPATNQCTIDKNRRKSCQAC
RLRKCYEVGMMKGGIRKDRRGGRMLKHKRQRDDGEGRGEVGSAGDMRAANLWPSPLMIKR
SKKNSLALSLTADQMVSALLDAEPPILYSEYDPTRPFSEASMMGLLTNLADRELVHMINW
AKRVPGFVDLTLHDQVHLLECAWLEILMIGLVWRSMEHPGKLLFAPNLLLDRNQGKCVEG
MVEIFDMLLATSSRFRMMNLQGEEFVCLKSIILLNSGVYTFLSSTLKSLEEKDHIHRVLD
KITDTLIHLMAKAGLTLQQQHQRLAQLLLILSHIRHMSNKGMEHLYSMKCKNVVPLYDLL
LEMLDAHRLHAPTSRGGASVEETDQSHLATAGSTSSHSLQKYYITGEAEGFPATV [Hom
o sapiens]
Targeted Disease Breast cancer
Drug Resistance Mutations
Mutation info Missense: E380Q [1], [2], [3]
Mutation Frequency 11 out of 76 patients
Mutation info Missense: P535H [1], [2], [3]
References
REF 1 Activating ESR1 mutations in hormone-resistant metastatic breast cancer. Nat Genet. 2013 Dec;45(12):1446-51.
REF 2 ESR1 ligand-binding domain mutations in hormone-resistant breast cancer. Nat Genet. 2013 Dec;45(12):1439-45.
REF 3 Emergence of constitutively active estrogen receptor- mutations in pretreated advanced estrogen receptor-positive breast cancer. Clin Cancer Res. 2014 Apr 1;20(7):1757-1767.

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